    <div class="figure">
      <img src="classes.png" style="width:25%" alt="classes" />
      <div class="caption"><strong>Figure 1:</strong> VOID classes in a hierarchy</div>
    </div>



    <div class="figure">
      <img src="properties.png" style="width:25%" alt="classes" />
      <div class="caption"><strong>Figure 2:</strong> VOID properties in a hierarchy</div>
    </div>